
Both deer went less than 40 yards and fell in sight.
A Spitfire entrance hole should NOT look like this...

This was from a buck I shot in 2006 a few weeks later. I was using no bands. The broadhead obviously was open on impact. That could provide some of the explanation as to why this shot was at least a foot back from where I was aiming. He first bedded about 100 yards from my stand and I jumped him from there about two hours later. Although I hated to, I backed out and a day long warm rain set in. I was able to recover him the next day after the rain subsided. Due to the warmth he was in no condition for the table.

I had one Spitfire 100 left and used it to take a doe in 2007. Since then I have using NAP Scorpion XP and Rage 3-blade heads. Both have performed flawlessly.
In defense of Spitfires, they shoot great. They kill great. You should just double-check that the blades are FULLY closed and seated on the clips when you load them. I almost always made a point to check. On that morning I don't recall checking to make sure the blades were fully closed. It is no excuse, but the result is that it was OPEN when it reached the target. Banding them would fix the problem.
I chose to change to another head that has an o-ring behind the blades so they cannot deploy on launch. Both the Rage and Scorpion XP are designed this way. It isn't an o-ring around the blades, but behind them.
Its all about confidence. I carry two broadheads now, and neither is a Spitfire.
DuckHunt